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Perception & Psychophysics 1992, 51 (6), 511-528
 

Summary: Perception & Psychophysics
1992, 51 (6), 511-528
Hysteresis, cooperativity, and depth averaging
in dynamic random-dot stereograms
BARTON L. ANDERSON
Vanderbilt University, Nashville, Tennessee
Experiments were performed to assess the response of the human visual system to dynamic
random-dot patterns composed of disparity mixtures. In Experiment 1, the perceived depth and
relative stability of two patterns were compared; one pattern depicted two transparent layers
of dots, and the other depicted a volume of dots. Two effects were found: (1) the volume pattern
exhibited a large degree of disparity averaging; and (2) asymmetries were observed in the rela-
tive stability of these two patterns. Experiment 2 was designed todetermine whether these find-
ings could be attributed tospatially localized processes occurring-at the location of disparity din-
continuities. This was accomplishedby introducing unpaired noise points localized either along
the disparity discontinuities or in the center of the layered and volume patterns. The amount
of depth averaging and the direction of the asymmetry did not appear to depend on processes
localized along the disparity discontinuities. Results of these experiments, taken in conjunction
withthose of previous studies, suggest that hysteresis is independent of cooperative persistence
mechanisms.
Two general types of network models have emerged

  

Source: Anderson, Barton L. - School of Psychology, University of Sydney

 

Collections: Biology and Medicine